I have a new 6600 but I also did very well on a MUCH smaller machine for several years ( even won a third place ribbon at the quilt show). For quilting , the 6600 is just as good as the Horizon except you have two inches more harp space in the Horizon. Everything else as far as QUILTING is the same. You have to decide if it's worth spending $1000 more for the extra stitches and the drop arm for garment sewing. If you do more sewing than quilting, I'd go for the Horizon. If you're a quilter mostly, save the money, buy a 6500 or 6600 and buy more fabric :) Two inches isn't enough to me to justify the huge jump in price. ( like I said, I did just fine on an even smaller machine than the 6600).